The G1 doesn’t officially hit the streets until tomorrow, but the 3rd and Market store in San Francisco will begin selling the first Android device starting today at 6PM PDT. If you’re not in the area and you didn’t pre-order then you’ll have to wait until tomorrow if, of course, you’re in a 3G market. Otherwise you’ll have to order online or in-store. Said 3G market stores will open at 8am local time for those interested.